Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vao hoang » van hoang, tao khoang, van hoan
thu nang » thi nang, thu hang, thu bang
hieu van » hieu va, thien van, lieu va
doi cua » dai cua, hoi cua
va hang » van hang, va nang, va lang
su sach » vu sach
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
nam tu » nam thu, nam thuc

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) OR (so sach)) thu nang xa hoi. hieu van nam tu ((vao hoang) or (va hang)) doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) thu nang xa hoi. hieu van nam tu ((vao hoang) OR (va hang)) doi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) thu nang xa hoi. hieu van nam tu ((vao hoang) or (va hang)) doi cua triet*".